1920189 has 8 divisors (see below), whose sum is σ = 2629600. Its totient is φ = 1245456.

The previous prime is 1920187. The next prime is 1920199. The reversal of 1920189 is 9810291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1920189 - 2¹ = 1920187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8539 + ... + 8760.

It is an arithmetic number, because the mean of its divisors is an integer number (328700).

2^1920189 is an apocalyptic number.

It is an amenable number.

1920189 is a deficient number, since it is larger than the sum of its proper divisors (709411).

1920189 is a wasteful number, since it uses less digits than its factorization.

1920189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17339.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1920189 is about 1385.7088438774. The cubic root of 1920189 is about 124.2933783470.

The spelling of 1920189 in words is "one million, nine hundred twenty thousand, one hundred eighty-nine".